Influence of Overhead Ground Wire Height and Impulse Ground Resistance on Lightning Protection Performance of Distribution Line

2015 ◽  
Vol 1092-1093 ◽  
pp. 281-287
Author(s):  
Yao Zhang Yu ◽  
Jun Kang Ni ◽  
Jun Yu Han ◽  
Bin Ren ◽  
Ao An Li ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Crucial Role ◽  
Power Transmission ◽  
Lightning Protection ◽  
Power Transmission Lines ◽  
Ground Resistance ◽  
Distribution Lines ◽  
Distribution Line ◽  
Lightning Protection Performance

Since distribution lines have relatively weak insulation compared to power transmission lines, it is more liable to lightning damages. This paper reports a study of how overhead ground wire height and impulse ground resistance affect the lightning protection performance. The results obtained in this paper show that high overhead ground wire worsen the lightning protection performance while reducing the impulse ground resistance improves the lightning protection performance. Therefore, it is recommended to set the overhead ground wire lower and take necessary measures to reduce impulse ground resistance. The results obtained also confirm the crucial role of the overhead ground wire as a protection of distribution lines.

Turkey’s energy trade relations with Europe: The role of institutions and energy market

2020 ◽  
pp. 0958305X2097729
Author(s):  
Halil Burak Sakal
Keyword(s):  
Water Resources ◽  
Transmission Lines ◽  
Electricity Market ◽  
Power Transmission ◽  
Regional Cooperation ◽  
River Basins ◽  
Power Transmission Lines ◽  
The European Union ◽  
Electricity Trade

Globally, the level of electricity grid interconnectedness between neighboring countries varies depending on the level of regional cooperation enabled by institutions. As suggested by previous research, in transboundary river basins, this variation affects the environment and the management of transboundary waters. In regions where all electricity utilities are connected and function at a synchronized frequency, and where integrated electricity market mechanisms function, the stress on the shared water resources tends to be less. Turkey shares river basins and power transmission lines in Europe both with the members of the European Union (EU) and with non-member states. The aim of this paper is to contribute to the literature on the geopolitics of renewable energy by comparing the level of Turkey’s electricity trade integrity with its EU-member European neighbors and with its non-EU-member neighbors and discuss the potential impacts of the transboundary electricity trade on the environment and the shared water resources. The main argument in this paper is that the higher level of electricity trade between Turkey and its EU-member neighbors is facilitated and boosted by Turkey’s membership to the European Network of Transmission System Operators for Electricity (ENTSO-E). The higher level of electricity interconnection leads to a higher level of cooperation in water and environment issues in the shared river basins between Turkey and Europe through the facilitating role of established institutions.

METHOD OF SYNTHESIS OF CLOSED-LOOP SYSTEMS OF ACTIVE SHIELDING MAGNETIC FIELD OF POWER TRANSMISSION LINES

2016 ◽  
Vol 2016 (4) ◽  
pp. 8-10 ◽  
Author(s):  
B.I. Kuznetsov ◽  
◽  
A.N. Turenko ◽  
T.B. Nikitina ◽  
A.V. Voloshko ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Transmission Lines ◽  
Closed Loop ◽  
Power Transmission ◽  
Power Transmission Lines ◽  
Closed Loop Systems ◽  
Active Shielding

scholarly journals Time-Multiplexed Self-Powered Wireless Current Sensor for Power Transmission Lines

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1561
Author(s):  
Hao Chen ◽  
Zhongnan Qian ◽  
Chengyin Liu ◽  
Jiande Wu ◽  
Wuhua Li ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Transmission Line ◽  
Transmission Lines ◽  
Power Transmission ◽  
Current Measurement ◽  
Current Sensor ◽  
Power Transmission Line ◽  
Power Transmission Lines ◽  
Current Sensing ◽  
Self Powered

Current measurement is a key part of the monitoring system for power transmission lines. Compared with the conventional current sensor, the distributed, self-powered and contactless current sensor has great advantages of safety and reliability. By integrating the current sensing function and the energy harvesting function of current transformer (CT), a time-multiplexed self-powered wireless sensor that can measure the power transmission line current is presented in this paper. Two operating modes of CT, including current sensing mode and energy harvesting mode, are analyzed in detail. Through the design of mode-switching circuit, harvesting circuit and measurement circuit are isolated using only one CT secondary coil, which eliminates the interference between energy harvesting and current measurement. Thus, the accurate measurement in the current sensing mode and the maximum energy collection in the energy harvesting mode are both realized, all of which simplify the online power transmission line monitoring. The designed time-multiplexed working mode allows the sensor to work at a lower transmission line current, at the expense of a lower working frequency. Finally, the proposed sensor is verified by experiments.

scholarly journals Decentralized Estimation of Two-port Equivalents for Power Transmission Lines

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Vedanta Pradhan ◽  
O. D. Naidu ◽  
Sinisa Zubic ◽  
Patrick Cost
Keyword(s):  
Transmission Lines ◽  
Power Transmission ◽  
Power Transmission Lines ◽  
Decentralized Estimation
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